Abstract
One-baryon-loop fluctuation contributions to the vacuum energy are included in relativistic Hartree calculations of closed-shell nuclei. These corrections decrease the nuclear scalar density by approximately 15% in the nuclear interior and may be observable in medium-energy proton-nucleus scattering. Their omission could significantly distort empirically determined neutron densities.
| Original language | English |
|---|---|
| Pages (from-to) | 181-186 |
| Number of pages | 6 |
| Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Volume | 140 |
| Issue number | 3-4 |
| DOIs | |
| State | Published - 7 Jun 1984 |
| Externally published | Yes |
Bibliographical note
Funding Information:There is considerable recent "evidence of relativistic single-particle potentials in nuclei. Large Lorentz scalar and vector potentials arise in relativistic optical-model fits to medium-energy proton-nucleus scattering \[1\],a nd similar potentials have been used in Dirac-Hartree studies of doubly magic nuclei with considerable success \[2-4\].I n addition, medium-energy nucleon-nucleus scattering has recently been accurately described in the relativistic impulse approximation, in which large Lorentz scalar and four-vector pieces arise by combining realistic nuclear densities with empirical nucleon-nucleon amplitudes \[5,6\]. It has also been known for sometime that one-boson-exchange-potential fits to nucleon-nucleon scattering favor these components in the nucleon-nucleon interaction \[7,8\]. An essential feature of these approaches is a large Lorentz scalar interaction. At ordinary nuclear densities, the resulting single-particle potential is a significant fraction of the nucleon mass, implying a sub- Supported in part by NSF Grant PHY 81-07395 and US DOE Contract DE-AC02-76ER03069.
Funding
There is considerable recent "evidence of relativistic single-particle potentials in nuclei. Large Lorentz scalar and vector potentials arise in relativistic optical-model fits to medium-energy proton-nucleus scattering \[1\],a nd similar potentials have been used in Dirac-Hartree studies of doubly magic nuclei with considerable success \[2-4\].I n addition, medium-energy nucleon-nucleus scattering has recently been accurately described in the relativistic impulse approximation, in which large Lorentz scalar and four-vector pieces arise by combining realistic nuclear densities with empirical nucleon-nucleon amplitudes \[5,6\]. It has also been known for sometime that one-boson-exchange-potential fits to nucleon-nucleon scattering favor these components in the nucleon-nucleon interaction \[7,8\]. An essential feature of these approaches is a large Lorentz scalar interaction. At ordinary nuclear densities, the resulting single-particle potential is a significant fraction of the nucleon mass, implying a sub- Supported in part by NSF Grant PHY 81-07395 and US DOE Contract DE-AC02-76ER03069.
| Funders | Funder number |
|---|---|
| National Science Foundation | PHY 81-07395 |
| U.S. Department of Energy | DE-AC02-76ER03069 |